Centrifugal governor



Feb. 10, 1931. P.,JABA$ 2,4

CENTRIFUGAL GOVERNOR Filed April 8. 1929 IN V EN TOR.

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Patented Feb. 10,1931

UNITED STATES PAUL JABAs, or LA cHAux DE ronns, SWITZERLAND GENTRIFUGAL GOVERNOR Application filed April 8, 1929, Serial No. 353,616, and in Switzerland July 19, 1928.

This invention relates to centrifugal governors and more particularly to speed governors for talking machines or other apparatus, the primary object being the-provision of a small and compact construction permitting accurate adjustment of the speed and assuring a noiseless running of the apparatus.

Other objects and advantages will be apm parent from the following description of a preferred embodiment of my invention, reference being had to the accompanying drawing wherein Fig. 1 is a plan view of a driving mecha- 5 nism of a talking machine.

Fig. 2 is a section through IIII of Fig. 1.

Figs. 3 and 4 show details of the governing device.

In Fig. 1 the drum 1 is mounted on the supporting plate 26 and encloses the driving spring which is wound by means of a handle adapted to be engaged on the square piece 2. The spring drum 1 causes the rotation of a pinion 5 by the intermediary of the pinion 3 and the wheel 4. The pinion 5 is mounted on the shaft 6 which supports the record table. This shaft also carries a worm wheel 7 meshing with the worm 8 which is integral with an end of the cylinder 9, the opposite end of the cylinder being provided with an extension shaft 10 which is pivoted on the pillar 11. The end of the worm 8 is pivoted 011 the pillar 12. Adjacent one end of the cylinder 9 there is disposed a second cylinder 13 pushed over the shaft 10 and adapted to be axially displaced over the shaft 10 against the action of the spring 14. I I The end face of the cylinder 9 opposite the cylinder 13 is provided with a frusto-con'ical recess (Fig. 3), the wider part thereof being disposed towards the face of the cylinder. This recess is divided in four radial portions 16 by providing four triangular-shaped blocks 15a,15b, 15c, 15d, equally spaced with means to the cylinder. Thus the bottom of U the four recessed portions 16 is formed of an inner part disposed vertically to the axis of the cylinder and an outer part which is inclined with respect to the axis. The face of the cylinder 13 opposite the cylinder 9 is 5 similarly arranged, so that opposite each recessed portion 16 of the cylinder 9 there is formed a like recessed portion 17 of the cylinder 13, two such opposite portions forming together a passageway wherein a ball 18 can radially move.

19 indicates a brake lever which is rotatably mounted on the supporting plate 26 by means of a pin 20. One arm 21 of the lever cooperates with a rotatably mounted cam formed by an eccentric disk 22 provided with .a handle 23. A spring 25 always tends to keep this arm in engagement with the cam. The other arm of the lever carries a brake shoe 24 adapted to apply pressure on the cylinder 13.

' \Vhen the spring motor 1 is started, it calls forth the rotation of the worm 8 and the cylinders 9 and 13. Owing to the action of the centrifugal force the balls 18 are driven towards the periphery of the cylinders and exert a pressure on the inclined parts of the recesses 16, 17 so that the cylinder 13 is pushed away from the cylinder 9 against the spring 10. The speed of the shaft 6 can thus be regulated by turning the handle 23 to position the brake shoe 24 so as to permit a shorter or a longer axial movement of the cylinder 13.

I claim:

A speed regulator comprising two rot'atable cylinders placed end to end and adapted to turn about a common axis, one of said cylinders being axially slidable, the two cylinders having their ends facing each other provided with cooperating recesses to form radial passageways decreasing in width outwardly balls freely inserted in said passageways and adapted to be moved outwardly oy centrifugal force to move said axially slidable cylinder, a manually operated r0- tatably mounted eccentric disk, a pivoted two-armed lever having one of its arms provided with a brake shoe adapted to limit the axial movement of said slidable cylinder, and spring means adapted to hold the other arm of said lever against the periphery of the eccentric disk whereby rotation of the disk permits to shift said brake shoe.

In testimony whereof I affix my signature.

PAUL JABAS. 

